*In March 1939, the German Ministry of Trade authorized export of Pringsheim's Majolica collection to London for auction at Sotheby's, provided that 80% of the proceeds up to £ 20,000 and 70% of the remainder be paid to the German Gold Discount Bank in foreign currency. Pringsheim was to receive the remaining proceeds. In exchange, Pringsheim and his wife were allowed to emigrate to Switzerland. See Timothy Wilson, "Alfred Pringsheim and his Collection of Italian Maiolica," in Otto von Falke, Die Majolikasammlung Alfred Pringsheim, augmented reprint with articles by Tjark Hausman, Carmen Ravanelli-Guidotti and Timothy Wilson, Ferrara 1994, vol. 3, pp. 85-87.